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THE DIAMETERof metallic ball is 21cm.What is the mass ,if the density is 5gm per cm cube |
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Answer» Diameter of sphere = 21 cm R= 10.5 cmVol. of sphere = 4/3πr³=(4/3*22/7*10.5*10.5*10.5)cm³=(88/3*1.5*10.5*10.5)cm³=(14553/3)cm³=4851cm³Density= mass/volumeTherefore; mass= density * volume = 5gm/cm³*4851cm³ = 24255gm Ans Consult NCERT class 9 book chapter surface area and volume for better understanding |
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